Questions about using the command-line interface (CLI).

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0
votes
1answer
23 views

How to compare float variables in awk?

awk -F, 'NR==FNR{c[$29]=$29;next} NF{print $29 ((c[$29]==$29)?" ":",mismatch")}' $file1 $file2 The value of 29th field, i.e., $29 in file1 was 832.9 and that of file2 was 832.9000. If I compare them ...
10
votes
5answers
1k views

How could I list all sudoers?

I want a command to list all sudoer users in Ubuntu 12.04. In other words, how could I list all users who have sudo ability? Suppose I'm a sudoer user. How could I know all other sudoer users?
2
votes
2answers
221 views

How to output the linux command and the returned result in the same text file?

All the commands I've seen so far look like command > file or command >> file, which output the result to the designated file. For instance, when I type openssl version > lab4.txt, all I ...
0
votes
1answer
32 views

How to copy and paste a file through the command-line? [duplicate]

I want to copy and paste a file to /usr folder but I guess I need root access to do so so I need to learn how to copy and paste a file from one location to another through the terminal.
0
votes
1answer
33 views

.bashrc edit messes up terminal command arrow-up history print

I wanted to give my terminal prompt in Ubuntu a more personal look, and wanted to change the text prior to the '$' when writing a command. From what I've found this is done by editing the .bashrc ...
2
votes
0answers
58 views

/bin/sh: 0: can't access tty; job control turned off [closed]

I'm building a custom image to run on a simulator. the kernel boots fine and everything but generates this warning: /bin/sh: 0: can't access tty; job control turned off and the terminal does not ...
4
votes
1answer
44 views

How to batch process JPG images to change its quality with Nautilus-Actions?

First of all: Thank you for taking the time to read this and provide some help. Any advices are appreciated. I am using Nautilus-Actions in order to add a custom context menu's action in order to ...
0
votes
0answers
191 views

/usr/bin/ld: cannot find -l

I wannt to install a program on my Ubuntu (Ubuntu 12.04) but when I type "make" in Terminal, it has errors: /usr/bin/ld: cannot find -lgeant321 /usr/bin/ld: cannot find -lkernlib /usr/bin/ld: cannot ...
4
votes
1answer
298 views

How do I completely clear a terminal window [duplicate]

The commands of clear, Ctrl+L, or reset are not adequate. They do not clear my terminal screen, they just seem to scroll the window down so I can't see everything above. I want it so that I can't ...
2
votes
1answer
46 views

How do you add/remove applications to/from the Unity Launcher from command line?

I am customizing an Ubuntu 14.04 Live CD with UCK (Ubuntu Customization Kit). The program gives you a chroot environment in a terminal to make changes. I want to add and remove what programs appear ...
7
votes
3answers
114 views

How to run a script when a directory is changed by another user?

I know has been a bit of discussion about topics similar to this. But here is what I am basically trying to do. I have a watch directory called watched and whenever a file is added to that directory, ...
4
votes
3answers
245 views

How to make an icon to enter terminal commands

Let me start by saying that I'm very new to Ubuntu in general, so I realize this may be a basic question. I'm using xubuntu 14.04. I recently got a wireless usb working by following the steps here. ...
0
votes
1answer
20 views

Problem installing Terminology terminal emulator

When trying to run/install Terminology on Ubuntu 14.04 I get the following error symbol lookup error: /usr/local/lib/libecore_evas.so.1: undefined symbol: _eina_log_state_shutdown I guess the ...
1
vote
1answer
44 views

Terminal commands for volume [duplicate]

I have a very simple question: What is the terminal command for changing the volume? I ask because I want to set a keyboard shortcut via the keyboard settings and I need the terminal command for it.
1
vote
2answers
198 views

“find: missing argument to `-exec'” when using “-exec rm -f {}\”

I run this command: ~/shell_temp$ find . -type f -name "IMAG1806.jpg" -exec rm -f {}\ i got output below: > IMAG1806.jpg Error: find: missing argument to `-exec' what is exact command for ...
0
votes
0answers
27 views

Installing Missing Commands [duplicate]

I am trying to learn linux commands and one particular thing I could not seem to find was; say a command like "split" is missing, how would you install it?
3
votes
1answer
36 views

sudo apt-get update command not working what i do [duplicate]

I'm on Ubuntu 14.04 and I tried running: sudo apt-get update But I get the below error: E: Malformed line 59 in source list /etc/apt/sources.list (dist parse) E: The list of sources could not be ...
5
votes
1answer
44 views

How do I restart a wget download?

I use the wget application. One file has stopped downloading. How can I stop the download and start the download again? Here's the log for wget $ tail -f wget-log 287350K .......... .......... ...
1
vote
1answer
25 views

bash file for managing public private and history of website

I have a website and i have 3 versions I have the beta version with the most recent and usually not fully working changes. I have the public site that is on www. lastly, i have the history that I ...
0
votes
2answers
53 views

Moving folders in Terminal [duplicate]

I'm trying to move a folder into another folder in terminal, but when I enter this line: mv South_America /North_America South_America just completely disappears. It didn't move into the ...
4
votes
6answers
137 views

How to search for specific lines in Linux? [duplicate]

I recently received an error telling me that there was a problem on line 52. I am trying to learn what the best method is for finding lines instead of actually counting them. In Windows, I often used ...
0
votes
0answers
11 views

'LIBXML2_2.9.0' not found (run PHP-file with shell_exec)

I wrote a PHP-script to execute another PHP-file in the terminal and got an error. If I run: $output = shell_exec("/usr/bin/php -v 2>&1"); echo "<PRE>$output</PRE>"; then I get ...
0
votes
1answer
29 views

how find the list of programs installed using the command line and how to get uninstall them [duplicate]

I have installed the ubuntu 14.04.2 LTS recently. I have used the terminal to install some music packages. But i dont no how many music packages that i have installed.So can any one help me with the ...
0
votes
1answer
49 views

how to set socks5 proxy in the terminal

I am a beginner using linux, I would like to connecting the terminal to the local proxy socks made by my ssh (Dynamic Port Forwarding), so is there a way to set up a proxy socks5 in the terminal? or ...
5
votes
1answer
92 views

What do these commands from a shell script do?

I'm just starting to learn bash. I have the following script, and I would like to know what does the following commands do in order to start to understand a little bit this world. if [ ! -w "." ] ...
1
vote
3answers
53 views

mv command with *-wildcard shows error “No such file or directory”

I have 6 .txt files on my desktop that I am trying to move using the Terminal. However when I try to mass move them all into the texts folder that is on my Desktop, I get the the following error: mv: ...
11
votes
2answers
1k views

What does this 'apt-get remove' instruction do?

What does the following code do? I found it on internet so I copied it and pasted it into terminal but when I installed a new kernel it only detects the old one. sudo apt-get remove --purge $(dpkg ...
3
votes
1answer
83 views

Can't see my files with “ls” anymore

HELP! I think I broke my DESKTOP :/ I was playing around with the Terminal and trying to practice moving, renaming, and copying files when I think I screwed something up. I was attempting to move ...
1
vote
1answer
39 views

How to change default browser AND the command line parameters used to open a link from gnome-terminal

I basically have the same question that was answered over here: How do I change the browser that gnome terminal opens links with? Except I am running on Ubuntu 14.04 and am interested in customizing ...
4
votes
1answer
145 views

Writing a program that will demo the $PS2 variable

I've been customizing my terminal prompt, and found that it's possible to change the "secondary prompt". However, I have no way to test the changes I make to this one so I was wondering if a simple ...
1
vote
1answer
38 views

How do I get nohup to execute [double-]quoted inner commands?

Let's say I want to run echo nested into watch nested into nohup. Starting from the bottom of the stack: echo test No problems with that. watch -n 1 'echo test' watch -n 1 "echo test" No ...
2
votes
1answer
27 views

No polish signs in terminal

I have changed my .bashrc file, so that $LANG variable is always set to en_US when I run new shell. This is because I have a program for making plots which takes the sign as a decimal separator based ...
1
vote
0answers
23 views

all my previous configurations and settings are gone by using the following command in ubuntu 14.04LTS

I used the command rm -rf ~/.Trash/* to empty the trash but when the command is executed, all my files in Download folder are deleted and all my Ubuntu settings are changed. Can anyone please help, ...
0
votes
2answers
30 views

why i why i can't kill viber?

i cant kill viber process in terminal. $ pkill Viber or $ pgrep Viber 2849 $ kill 2849 or $ killall -v Viber Killed Viber(2849) with signal 15 not work ! but in System Monitor by ...
14
votes
6answers
726 views

Most efficient way of launching and separating a program from the terminal? [duplicate]

I'm trying to launch a program from the Terminal in such a way that the following occurs: Closing the Terminal does not close the program The program is not outputting anything to the Terminal while ...
5
votes
4answers
338 views

Get previous commands in Terminal that match the currently typed command [duplicate]

In some terminals you can do something like this... Type some command nmap -sn 192.168.1.1/24 Then go on to do other things in the terminal for a while. Then later you can type nmap and then ...
0
votes
0answers
8 views

The disk drive for /u01 is not ready yet or not present

when i boot i see this message The disk drive for / is not ready yet or not present. Continue to wait, or Press S to skip mounting or M for manual recovery. i want solution to remove this message and ...
3
votes
1answer
63 views

Configure Linux Text mode Size (Rows and Columns)

I'm having issues with controlling the size of a text-mode program. This is a database program (Dataflex) that I recently had working on Windows 98 DOS mode and now am moving it to Linux. I have ...
0
votes
2answers
75 views

Enforce a shell script to execute a specific python version

Update. Changing the alias unfortunately does not work. I have changed the alias to alias python='/usr/bin/python2.7' however the shell script still runs the python script in 2.4.3. Muru - I am ...
2
votes
1answer
39 views

Xresources not working properly after restart

I am trying to change my xterm theme using a hack in Xresources which i found in this website. i have created a Xresources in my home dirctory and entered the below code. XTerm*faceName: Bitstream ...
0
votes
0answers
26 views

I need to install f.lux and I think I may have hit a road block.

I was wondering how to get out of this situation where I can't seem to respond to the Terminal's question. See image for info. It keeps asking if another process is using it, because it is unable to ...
0
votes
1answer
28 views

Grep/egrep not working correctly?

I seem to be using grep incorrectly. Observe: > hg log <filepath> | egrep changeset changeset: 3961:9dedc55e030a changeset: 3651:d23495ab1168 changeset: 2974:6aa71cb2c575 changeset: ...
3
votes
1answer
48 views

How to run a single command multiple times while changing one word in the command each time it is run?

I've got a command like this: grep word1 file.txt | grep word2 | grep word3 I want to be able to run this entire command multiple times while changing the value of "word1" each time. I have a file ...
1
vote
0answers
23 views

Terminal GDM session

How would I create a session file so that when I login using GDM it just launches a terminal session (No windowing, just a plain terminal like in Ubuntu Server)?
1
vote
2answers
30 views

Folder permissions changed [duplicate]

I have very specific questions regarding permissions. I have delved into the FilePermissions Wiki - https://help.ubuntu.com/community/FilePermissions Recently I installed an ecommerce open source ...
0
votes
1answer
48 views

Why does this apt-get command work in one context but not the other?

I'm trying to add the plpython package to my docker container (running an Ubunutu image) using the following command (RUN being the docker command that you can ignore if you don't know Docker): RUN ...
2
votes
3answers
159 views

Error when running script in bash

I wrote a script in bash to basically create aliases, but for any reason, it doesn't work in some cases. Here it's the code: #!/bin/bash #Script to create unique and permanent aliases _add_alias() { ...
0
votes
1answer
41 views

why google chrome shuts down after closing the terminal?

I have to use Google chrome while running the terminal in the background. In fact if I press ctrl+c it shuts down with the Google chrome too. Why is it happening? Is there any way I can resume Google ...
0
votes
3answers
53 views

How to copy folder as root in Lubuntu 14.04 terminal?

I am trying to copy the b43 folder into the /lib/firmware folder. I know I asked this before, but this is on a completely different OS. I can't seem to launch nautilus using sudo nautilus or gksu ...
1
vote
2answers
37 views

Why won't XScreensaver install from the command line?

All I know is that I get the following output in my terminal: supuhstar@SupuhComp-U:~$ sudo apt-get install xscreensaver xscreensaver-gl-extra xscreensaver-data-extra xscreensaver-screensaver-bsod -y ...